EP0092485A1 - Dispositif d'affichage pour appareil de mesure de vitesse pour véhicule - Google Patents

Dispositif d'affichage pour appareil de mesure de vitesse pour véhicule Download PDF

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Publication number
EP0092485A1
EP0092485A1 EP83400771A EP83400771A EP0092485A1 EP 0092485 A1 EP0092485 A1 EP 0092485A1 EP 83400771 A EP83400771 A EP 83400771A EP 83400771 A EP83400771 A EP 83400771A EP 0092485 A1 EP0092485 A1 EP 0092485A1
Authority
EP
European Patent Office
Prior art keywords
circuit
car
speed
segments
output signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83400771A
Other languages
German (de)
English (en)
Other versions
EP0092485B1 (fr
Inventor
Tohru Teshima
Chiriro Funaoka
Pierre-Henri Robert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SA
Stanley Electric Co Ltd
Original Assignee
Renault SA
Regie Nationale des Usines Renault
Stanley Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SA, Regie Nationale des Usines Renault, Stanley Electric Co Ltd filed Critical Renault SA
Publication of EP0092485A1 publication Critical patent/EP0092485A1/fr
Application granted granted Critical
Publication of EP0092485B1 publication Critical patent/EP0092485B1/fr
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/40—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect
    • G01R13/404—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values
    • G01R13/405—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values using a plurality of active, i.e. light emitting, e.g. electro-luminescent elements, i.e. bar graphs
    • G01R13/406—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values using a plurality of active, i.e. light emitting, e.g. electro-luminescent elements, i.e. bar graphs representing measured value by a dot or a single line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/22—Display screens
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G01P1/103—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the value of the measured signal with one or several reference values

Definitions

  • one of the objects of this invention is to provide a display of speedometer for automobile low in price and easy to watch for a driver in terms of display construction with arrangement being made so as to perform liquid-crystal bar graphic displays of a car speed and an index indicating a desired set car speed on a display means by using a driving circuit.
  • Another object of this invention is to provide a display unit of speedometer for automobile in which number of segments necessary to construct the bar graph are formed in arbitrary shape and are arranged adjacently in sequence while the aforesaid car speed and index are displayed by the display means different each other on said segments so as to enable a driver to clearly distinguish the car speed and the index on one and the same display device.
  • Numeral 1 is a display device which is formed as the bar graphic displaying A comprising necessary number of segments 2 using liquid crystal. Namely, as shown, n-piece segments 2 same in size of long and narrow plates are arranged and connected together, and arrangement is made so as to enable the display device 1 to display desired car speeds with each one piece of segments 2 being used as one scale of the basic unit such as 1 Km/h or 2 Km/h. Numeral 3 is scales shown on the necessary positions of the display device 1.
  • the display device 1 can display proper numerical values as a result of changes in condition of light and darkness, transparency and turbidity, etc. which are caused by the changes of optical properties of liquid crystal relative to the necessary segments 2 in the field on which voltage is impressed and are different from the liquid crystal relative to other segments in the filed on which no voltage is impressed.
  • the display range may take the necessary construction easy to watch for a driver in the daytime and nighttime with transmitted light, reflected light, etc. by display means under DS (dynamic scattering) system, TN (twisted nematic) system, ECB (electrically controlled birefringence) system, PC (phase change) system, etc. according to the difference in the mechanism transforming the changes in condition of liquid crystal caused by electric signals into optical information.
  • DS dynamic scattering
  • TN twisted nematic
  • ECB electrically controlled birefringence
  • PC phase change
  • each segment 2 can freely be arranged, for example the arrangement in up-to-down direction, not to speak of the arrangement in right-to-left direction as shown, and can be constructucted to desired shapes without limiting to the construction shown, while the display device 1 on the whole can be formed to circular arc, circle, circular ring, etc. as desired according to the shapes of segmentsa
  • Numeral 4 is a car speed operational circuit which is arranged so as to make it possible to input car speed pulse signals according to speeds of automobile (car speeds) and to make it possible to transmit signals, by computing car speeds as the distance (Km/h) per average unit time, to next stage continuously or at intervals of desired set time.
  • Numeral 5 is a constant speed running circuit, to which a driver can set freely any desired car speed, and transmit the output signals corresponding to the set speed for making it possible to perform constant speed running by conventionally known means, and also can display the desired speed by functioning the corresponding desired segment 2 as an index in the display device 1.
  • Numeral 6 is a comparing circuit which compares the size of set speed signals f with the size of car speed signals e sent by the aforesaid both circuits 4 and 5 respectively and can transmit output signals controlling a selector 9 that changes over output signals of two sets of bar graph decoder 7 and 8.
  • the bar graph decoder 8 mentioned above is provided with connecting wires 11 corresponding to n-piece segments 2 on its output side, is connected with a terminal 1 0b of the selector 9 mentioned above through the EX-OR circuit 12a, and is arranged so as to transmit signals only through a connecting wire 11x corresponding to the maximum value of set speed signals transmitted by the constant speed running circuit 5.
  • the bar graph decoder 7 mentioned above is provided with connecting wires 13 corresponding to n-piece segments 2 on its output side, is connected with a terminal 10a of the selector 9 mentioned above through the OR circuit 12b, and is arranged so as to transmit signals through all connecting wires, 13 1 , 13 2' ... 13y, corresponding to car speed signals transmitted by the car speed operational circuit 9.
  • Numeral 14 is a liquid-crystal driving circuit connected with the selector 9, and is arranged so as to perform liquid-crystal display by giving optical changes to the liquid-crystal to segments 2 by the connection with each segment 2 of the display device 1 mentioned above.
  • the car speed pulse signals of intake manifold detected during the running of automobile are applied constantly, at the values according to the changes of car speed, to the car speed operational circuit 4, and are computed in said circuit 4 to become the output signals e, which are applied to the comparing circuit 6 and at the same time are inputted in the bar graph decoder 17.
  • the output signal f corresponding to the set speed transmitted by the constant speed running circuit 5 is inputted in the comparing circuit 6 and the bar graph decoder 8 respectively.
  • the selector 9 changes its switch 10 over to the terminal 10a, and therefore the car speed signals, transmitted through the connecting wires 23 1 , 23 2 ,... 13y of the bar graph decoder 7, are applied to a liquid-crystal driving circuit 14 through the selector 9 via the OR circuit 10b, and can be displayed in the state of oblique line portion in Fig. 3 (a) by giving optical changes to the corresponding segments 2 of the display device 1 which are made to function in the field on which desired voltage is impressed.
  • the signals corresponding to the set speed transmitted by the bar graph decoder 7 are transmitted only through a connecting wire 11x corresponding to the maximum value, the signals are applied to the liquid-crystal driving circuit 14 through the selector 9 via OR circuit 12b, and can be displayed in the state of Fig. 3 (b) by giving optical changes to a corresponding segment 2 of the display device 1 which is made to function in the field on which voltage is impressed.
  • the display device 1 being one piece, the both signals are synthesized in the display device 1 and are displayed in the state of oblique line portion in Fig. 3 (c).
  • the selector 9 changes its switch 10 over to the terminal 10b influenced by the output signals of the comparing circuit 6 ; therefore if the both signals from both bar graph decoders 7 and 8 are applied individually to the display device 1 as mentioned above, the both signals result in giving optical changes to corresponding segments 2, which are made to function, and are displayed respectively in the state of oblique line portions of Fig. 4(a) and (b).
  • the segments displaying the index of set speed according to the running state of automobile are displayed in two ways; one being the case where the segments displaying the index of set speed are different from the segments displaying the car speed, and the other being the case where the both segments are same. If the both segments are different from each other, the both segments are displayed, with optical changes being given to them. If the both segments are same, optical changes are not given only to the segments which agree with each other and the other segments of car speed are displayed in the state where optical changes are given to them.
  • the display by which the car speed is distinguishable from the set car speed, is not obtainable.
  • the above shows the case where the running is made in the state equal to or closest to the set car speed, and there is no problem causing any obstacle in the practical use.
  • the embodiment described above may be constructed by changing reversely the driving condition of each segment 2 in the display device 1.
  • two displaying items of car speed and index corresponding to set car speed are incorporated as one body in the display device provided with one bar graph using liquid crystal or other luminous means.
  • This makes it possible to make the display device small in size by saving the displaying space and makes it possible to use in common the driving circuit for two displaying items resulting in decreasing the cost ; and moreover a driver can obtain two kinds of information on car speed and set car speed by watching only one display device, so that this invention has an advantage of securing the safety of driving because the driver has only to release his eyes for a very short time from the front during the running.
  • the driver can drive the car, comparing car speeds with an index of set car speed during the running ; and this enables the driver to get the effect of driving the car constantly at proper speed by shifting the gear in order to make the car speed close to the set car speed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Instrument Panels (AREA)
  • Indicating Measured Values (AREA)
EP83400771A 1982-04-20 1983-04-19 Dispositif d'affichage pour appareil de mesure de vitesse pour véhicule Expired EP0092485B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP64876/82 1982-04-20
JP57064876A JPS58190767A (ja) 1982-04-20 1982-04-20 自動車用スピ−ドメ−タの表示装置

Publications (2)

Publication Number Publication Date
EP0092485A1 true EP0092485A1 (fr) 1983-10-26
EP0092485B1 EP0092485B1 (fr) 1987-01-14

Family

ID=13270763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400771A Expired EP0092485B1 (fr) 1982-04-20 1983-04-19 Dispositif d'affichage pour appareil de mesure de vitesse pour véhicule

Country Status (5)

Country Link
US (1) US4647901A (fr)
EP (1) EP0092485B1 (fr)
JP (1) JPS58190767A (fr)
DE (1) DE3369195D1 (fr)
ES (1) ES8404060A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0462375A1 (fr) * 1990-06-16 1991-12-27 Manfred Balom Procédé et dispositif pour surveiller la vitesse

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4894641A (en) * 1989-01-24 1990-01-16 Cotron Corporation Real-time speed display apparatus
US5051935A (en) * 1989-05-25 1991-09-24 Matty Richard D Drag race analyzer
US5309139A (en) * 1990-08-03 1994-05-03 Austin Charles W Vehicle monitoring system
JPH05273493A (ja) * 1992-03-27 1993-10-22 Yazaki Corp ヘルメットディスプレイ
DE4214817C2 (de) * 1992-05-05 1994-03-03 Daimler Benz Ag Verfahren zur Anzeige der geschwindigkeitsbedingten Gefahrenträchtigkeit der Fahrsituation eines Fahrzeugs, und Vorrichtung zur Durchführung des Verfahrens
GB2286885B (en) * 1994-02-17 1997-10-15 Sony Uk Ltd A display device
DE19547375B4 (de) 1995-12-19 2005-07-28 Daimlerchrysler Ag Anzeigeeinrichtung
US6263282B1 (en) 1998-08-27 2001-07-17 Lucent Technologies, Inc. System and method for warning of dangerous driving conditions
US8112408B2 (en) * 2009-07-28 2012-02-07 Hewlett-Packard Development Company, L.P. System and method for generating a user-defined function using a shell
US20090240396A1 (en) * 2008-03-19 2009-09-24 John T. Sullivan Pit road display
US9041716B2 (en) 2012-02-24 2015-05-26 General Electric Company Multivalue bar graph displays and methods of implementing same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1623874B1 (de) * 1967-06-02 1971-05-27 Vdo Schindling Vorrichtung zur Anzeige von Messwerten in Leuchtbandform
DE1623871B1 (de) * 1967-06-02 1971-09-09 Vdo Schindling Vorrichtung zur anzeige von messwerten mit unterschiedlichem abbildungsmasstab
GB1501931A (en) * 1976-04-15 1978-02-22 Honeywell Ltd Bar display with multiple indication
DE2811661A1 (de) * 1977-03-18 1978-09-21 Matsushita Electric Ind Co Ltd Signalpegel-anzeigeeinrichtung, insbesondere fuer geraete der unterhaltungselektronik
GB2019070A (en) * 1978-04-14 1979-10-24 Fresenius Chem Pharm Ind Indicator and limit value alarm apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54109484A (en) * 1978-02-15 1979-08-28 Nissan Motor Speed alarm

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1623874B1 (de) * 1967-06-02 1971-05-27 Vdo Schindling Vorrichtung zur Anzeige von Messwerten in Leuchtbandform
DE1623871B1 (de) * 1967-06-02 1971-09-09 Vdo Schindling Vorrichtung zur anzeige von messwerten mit unterschiedlichem abbildungsmasstab
GB1501931A (en) * 1976-04-15 1978-02-22 Honeywell Ltd Bar display with multiple indication
DE2811661A1 (de) * 1977-03-18 1978-09-21 Matsushita Electric Ind Co Ltd Signalpegel-anzeigeeinrichtung, insbesondere fuer geraete der unterhaltungselektronik
GB2019070A (en) * 1978-04-14 1979-10-24 Fresenius Chem Pharm Ind Indicator and limit value alarm apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ELECTRONIQUE ET APPLICATIONS INDUSTRIELLES, no. 268, 1st May 1979, pages 19-21, Paris, FR. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0462375A1 (fr) * 1990-06-16 1991-12-27 Manfred Balom Procédé et dispositif pour surveiller la vitesse

Also Published As

Publication number Publication date
ES521615A0 (es) 1984-04-01
US4647901A (en) 1987-03-03
DE3369195D1 (en) 1987-02-19
ES8404060A1 (es) 1984-04-01
JPS58190767A (ja) 1983-11-07
EP0092485B1 (fr) 1987-01-14

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